CN210457853U - Landfill leachate's processing apparatus - Google Patents
Landfill leachate's processing apparatus Download PDFInfo
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- CN210457853U CN210457853U CN201921239459.1U CN201921239459U CN210457853U CN 210457853 U CN210457853 U CN 210457853U CN 201921239459 U CN201921239459 U CN 201921239459U CN 210457853 U CN210457853 U CN 210457853U
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Abstract
The utility model relates to a landfill leachate's processing apparatus belongs to landfill leachate treatment technical field. The processing apparatus is composed of a processing apparatus A and a processing apparatus B, and is characterized in that: the processing device A and the processing device B are communicated through a communication pipe. The treatment device removes the influence of mixed bacteria and metal ions on biochemical bacteria through concentrated sulfuric acid and neutralization precipitation reaction, so that the content of pollutants in raw water can be stably reduced, the raw water is filtered step by step through the external MBR filter, the nanofiltration filter and the reverse osmosis filter to enable the effluent to reach the first-level discharge standard, and the problems that the traditional raw water treatment device and treatment method are poor in treatment stability, and COD (chemical oxygen demand) and ammonia nitrogen content in the effluent fluctuate greatly are solved.
Description
Technical Field
The utility model relates to a landfill leachate's processing apparatus belongs to landfill leachate treatment technical field.
Background
The landfill leachate is raw water percolated out by the fermentation, rain wash and surface water and underground water soaking of the garbage in the stacking and landfill processes. The composition of leachate is very complex, and its properties depend on the composition of the refuse, the particle size of the refuse, the degree of compaction, the climate on site, the hydrological conditions and the landfill time, and generally have the following characteristics: 1. the components are complex; CODcrAnd BOD5The concentration is high; 3. the ammonia nitrogen content is high; 4. the content of metal ions is high, and the landfill leachate contains more than ten metal ions; 5. the biodegradability is poor.
The traditional raw water treatment device and the traditional treatment method can not meet the requirement of high removal rate of COD and ammonia nitrogen, the stability is poor, the COD and ammonia nitrogen content of the effluent after the raw water is treated often fluctuate greatly, and the COD and ammonia nitrogen content in the effluent often exceed the raw water COD and ammonia nitrogen content standard specified in the wastewater discharge standard established by China.
Disclosure of Invention
The utility model discloses an invention purpose is: aiming at the defects of the prior art, the device for treating the landfill leachate is provided, which can improve the stability of treating the landfill leachate and ensure that the COD and the ammonia nitrogen content in the treated effluent are always kept below the pollutant discharge standard specified in the 'sewage discharge standard' formulated by the state.
The technical scheme of the utility model is that:
the utility model provides a landfill leachate processing apparatus, it comprises processing apparatus A and processing apparatus B, its characterized in that: the treatment device A is communicated with the treatment device B through a communicating pipe, the treatment device A is composed of a raw water pool, a pipeline mixer, a Fenton reaction tower and a precipitation tower, and the pipeline mixer, the Fenton reaction tower and the precipitation tower are sequentially arranged on one side of the raw water pool; the raw water pool is communicated with the mixer, the Fenton reaction tower and the precipitation tower in sequence through communicating pipelines, and communicating pipes are arranged on the precipitation tower; the treatment device B is composed of a sedimentation buffer tank, a mud membrane composite aeration tank, an external MBR sludge filter, a nanofiltration filter and a reverse osmosis filter, wherein the mud membrane composite aeration tank, the external MBR sludge filter, the nanofiltration filter and the reverse osmosis filter are sequentially arranged on one side of the sedimentation buffer tank, the sedimentation buffer tank is sequentially communicated with the mud membrane composite aeration tank, the external MBR sludge filter, the nanofiltration filter and the reverse osmosis filter through communicating pipes, and the sedimentation buffer tank is communicated with the communicating pipes.
The communicating pipeline between the pipeline mixer and the raw water pool is provided with a sulfuric acid dosing tank through a communicating pipeline, and the pipeline mixer is provided with a ferrous sulfate dosing tank through a communicating pipeline.
A neutralization and sedimentation tank is arranged on the Fenton reaction tower; a hydrogen peroxide dosing tank is arranged on the Fenton reaction tower through a connecting pipe; the neutralization and precipitation tank is provided with a sodium hydroxide dosing tank through a connecting pipe; the Fenton reaction tower is communicated with the neutralization and precipitation tank through a discharge pipe; one side of the Fenton reaction tower is provided with a circulating pipe which is communicated with a discharge pipe; the other side of the Fenton reaction tower is provided with an overflow pipe which is communicated with the raw water pool.
A coagulation tank is arranged on the settling tower; the coagulation tank is provided with a PAM dosing tank through a connecting pipe; the coagulation tank is communicated with the neutralization sedimentation tank through a connecting pipe; the bottom of the settling tower is provided with a settling tower sludge discharge pipe, and a communicating pipe is arranged on the settling tower above the settling tower sludge discharge pipe.
The external MBR filter is communicated with the nanofiltration filter through a filtering buffer tank, the reverse osmosis filter is communicated with the nanofiltration filter through a clear water buffer tank, a water outlet buffer tank is arranged on the reverse osmosis filter through a communicating pipeline, and a water outlet pipe is arranged on the water outlet buffer tank.
The sludge-film composite aeration tank is provided with an aeration pump through an aeration pipe.
One side of the external MBR sludge filter is provided with a return pipe which is communicated with the sludge membrane composite aeration tank, and the other side of the external MBR sludge filter is provided with an MBR sludge discharge pipe.
The beneficial effects of the utility model reside in that:
the garbage leachate treatment device kills sundry bacteria in raw water by the heat release principle when concentrated sulfuric acid is dissolved in water, and precipitates most of metal ions by neutralization, and the influence of the sundry bacteria and the metal ions on biochemical bacteria in a sludge membrane aeration tank is eliminated by the method, so that the COD and the ammonia nitrogen content in the raw water can be stably reduced, the raw water is filtered step by an external MBR (membrane biological reactor) filter, a nanofiltration filter and a reverse osmosis filter, and the filtered raw water can reach the first-level discharge standard (COD: 50 mg/l; ammonia nitrogen: 10 mg/l) of the sewage discharge standard, and the problems of poor treatment stability and large fluctuation of the COD and the ammonia nitrogen content in effluent in the traditional raw water treatment device and treatment method are solved.
Drawings
Fig. 1 is a schematic structural view of a processing apparatus a of the present invention;
fig. 2 is a schematic structural diagram of a processing apparatus B of the present invention.
In the figure: 1. the system comprises a raw water pool, 2, a pipeline mixer, 3, a sulfuric acid dosing tank, 4, a ferrous sulfate dosing tank, 5, a Fenton reaction tower, 6, a hydrogen peroxide dosing tank, 7, a sodium hydroxide dosing tank, 8, a neutralization settling tank, 9, a circulating pipe, 10, an overflow pipe, 11, a PAM dosing tank, 12, a coagulation tank, 13, a settling tower, 14, a mud membrane composite aeration tank, 15, an external MBR sludge filter, 16, a settling buffer tank, 17, a return pipe, 18, a nanofiltration filter, 19, a reverse osmosis filter, 20, a clear water buffer tank, 21, an outlet buffer tank, 22, a filtering buffer tank, 23, a discharge pipe, 24, an aeration pipe, 25, a communicating pipe, 26, a settling tower sludge discharge pipe, 27, an MBR sludge discharge pipe, 28, an aeration pump, 29 and a water outlet pipe.
Detailed Description
The treatment device of the landfill leachate comprises a treatment device A of the landfill leachate and a treatment device B of the landfill leachate, wherein the treatment device A of the landfill leachate is connected with the treatment device B of the landfill leachate through a connecting pipe 25. The landfill leachate treatment device A is composed of a raw water tank 1, a pipeline mixer 2, a Fenton reaction tower 5, a settling tower 13, a sulfuric acid dosing tank 3, a ferrous sulfate dosing tank 4, a hydrogen peroxide dosing tank 6, a sodium hydroxide dosing tank 7 and a PAM dosing tank 11, wherein the pipeline mixer 2, the Fenton reaction tower 5 and the settling tower 13 are sequentially arranged on one side of the raw water tank 1; the raw water pool 1 is communicated with the mixer 2, the Fenton reaction tower 5 and the precipitation tower 13 in sequence through communicating pipelines; sulphuric acid adds medicinal cupping 3, ferrous sulfate adds medicinal cupping 4, hydrogen peroxide solution adds medicinal cupping 6, sodium hydroxide adds medicinal cupping 7 and PAM and is the medicinal cupping 11, add the medicinal cupping by jar body 30, agitator motor 31 and stirring rake 32 constitute, be provided with agitator motor 31 on jar body 30, agitator motor 31's transmission shaft extends to jar internal 30, extend to jar and be equipped with stirring rake 32 on the transmission shaft in the body 30, add the medicinal cupping during operation, drive stirring rake 32 and stir the medicament in the jar body 30 through agitator motor 31. The Fenton reaction tower 5 is a reaction vessel for performing Fenton reaction on raw water, a pipeline mixer 2 (GH-250 type pipeline mixer) is arranged on a pipeline between the Fenton reaction tower 5 and the raw water pool 1, a sulfuric acid dosing tank 3 is arranged on a communication pipeline between the pipeline mixer 2 and the raw water pool 1 through the communication pipeline, and during operation, high-concentration sulfuric acid is added into the raw water of the pipeline between the pipeline mixer 2 and the raw water pool 1 through the sulfuric acid dosing tank 3.
Ferrous sulfate dosing tank 4 is equipped with through the intercommunication pipeline on the pipeline mixer 2, the during operation adds ferrous sulfate through ferrous sulfate dosing tank 4 to the raw water of pipeline mixer 2, the effect of pipeline mixer 2 is the during operation, mixes sulphuric acid, ferrous sulfate and raw water in adding the raw water, utilizes the internal diameter increase of pipeline to 2 departments of pipeline mixer and 2 blades of pipeline mixer to the blockking and baffling of liquid and reduce the pressure in pipeline mixer 2 and the pipeline that links to each other simultaneously.
The Fenton reaction tower 5 is provided with a hydrogen peroxide adding tank 6 through a communicating pipeline, and hydrogen peroxide is added into the Fenton reaction tower 5 through the hydrogen peroxide adding tank 6 during working. Be provided with neutralization and precipitation jar 8 on the fenton reaction tower 5, be provided with the agitator on neutralization and precipitation jar 8, be equipped with sodium hydroxide dosing tank 7 through the intercommunication pipeline on the neutralization and precipitation jar 8 of agitator one side, during operation, add sodium hydroxide to neutralization and precipitation jar 8 through sodium hydroxide dosing tank 7, make sodium hydroxide and raw water mix and react in neutralization and precipitation jar 8, make raw water and sodium hydroxide misce bene through the agitator to accelerate the reaction rate of raw water and sodium hydroxide through the stirring.
One side of the Fenton reaction tower 5 is provided with a circulating pipe 9, the circulating pipe 9 enables raw water in the Fenton reaction tower 5 to circulate, hydrogen peroxide, ferrous sulfate and the raw water are fully mixed, and the reaction speed in the Fenton reaction tower 5 is accelerated through continuous circulation. The circulation pipe 9 is provided with a discharge pipe 23, the circulation pipe 9 is communicated with the neutralization and sedimentation tank 8 through the discharge pipe 23, when in operation, a part of raw water entering the circulation pipe 9 is refluxed to the Fenton reaction tower 5 through the circulation pipe 9 and a valve on the discharge pipe 23, thereby the raw water is circulated in the Fenton reaction tower 5, and the other part of raw water entering the circulation pipe 9 is conveyed to the neutralization and sedimentation tank 8.
The other side of the Fenton reaction tower 5 is provided with an overflow pipe 10, the overflow pipe 10 is communicated with the raw water pool 1, and the overflow pipe 10 enables the raw water in the Fenton reaction tower 5 to overflow into the raw water pool 1, so that the situation that the raw water in the Fenton reaction tower 5 reversely flows into the hydrogen peroxide dosing tank 6 due to overhigh pressure in the Fenton reaction tower 5 is prevented.
A coagulation tank 12 is arranged on the sedimentation tower 13, a stirrer is arranged on the coagulation tank 12, one side of the coagulation tank 12 is communicated with a PAM dosing tank 11 through a communicating pipeline, PAM is added into the coagulation tank 12 through the PAM dosing tank 11 during operation, PAM and raw water conveyed into the coagulation tank 12 from a neutralization sedimentation tank 8 are uniformly mixed through the stirrer, the other side of the coagulation tank 12 is communicated with the upper end of the sedimentation tower 13, a sedimentation sludge discharge pipe 26 is arranged at the bottom of the sedimentation tower 13 (vertical sedimentation tower), a communicating pipe 25 is arranged on the sedimentation tower 13 above the sedimentation sludge discharge pipe 26, during operation, the raw water enters the sedimentation tower 13 from top to bottom through a water inlet pipe arranged at the central part of the sedimentation tower 13, an umbrella-shaped baffle plate is arranged below the water inlet pipe to ensure that the raw water slowly rises after being uniformly distributed in the tower, suspended matters settle into a conical sedimentation sludge hopper at the bottom of the sedimentation tower 13, the conical sludge discharge pipe 26 is arranged, the settled suspended matter is discharged through the settling tower sludge discharge pipe 26, and the supernatant is collected from the periphery of the settling tower 13 along the peripheral overflow weir and is discharged through the communicating pipe 25.
The treatment device B is composed of a precipitation buffer tank 16, a mud membrane composite aeration tank 14, an external MBR sludge filter 15, a filtration buffer tank 22, a nanofiltration filter 18, a clear water buffer tank 20, a reverse osmosis filter 19 and an effluent buffer tank 21, wherein the mud membrane composite aeration tank 14, the external MBR sludge filter 15, the filtration buffer tank 22, the nanofiltration filter 18, the clear water buffer tank 20, the reverse osmosis filter 19 and the effluent buffer tank 21 are sequentially arranged on one side of the precipitation buffer tank 16, and the precipitation buffer tank 16 is sequentially communicated with the mud membrane composite aeration tank 14, the external MBR sludge filter 15, the filtration buffer tank 22, the nanofiltration filter 18, the clear water buffer tank 20, the reverse osmosis filter 19 and the effluent buffer tank 21 through communicating pipelines; the sedimentation buffer tank 16 is communicated with a communicating pipe 25, and raw water enters the sedimentation buffer tank 16 through the communicating pipe 25 during operation.
The aeration pipe 24 is arranged on the mud-film composite aeration tank 14, the end of the aeration pipe 24 is provided with an aeration pump 28, and the aeration pump 28 fills a large amount of air into the mud-film composite aeration tank 14 through the aeration pipe 24, so that the oxygen content in the mud-film composite aeration tank 14 is improved, and the activity of aerobic bacteria in the mud-film composite aeration tank 14 is improved. The external MBR sludge filter 15 is provided with a return pipe 17, the return pipe 17 is communicated with the sludge membrane composite aeration tank 14, the filtered sludge is discharged through an MBR sludge discharge pipe 27 arranged on the external MBR sludge filter, and the external MBR sludge filter 15 combines the membrane separation technology in the raw water treatment process with the traditional wastewater biological treatment technology, so that the separation efficiency of the sludge in the raw water is greatly improved; meanwhile, the concentration of biochemical bacteria in the external MBR sludge filter 15 is increased in the filtering process, so that the biochemical reaction rate of raw water in the external MBR sludge filter is greatly increased, the F/M ratio (the ratio of organic matters to the biochemical bacteria) in the external MBR sludge filter 15 is reduced, the generation amount of residual sludge in the external MBR sludge filter 15 is reduced, and the problems that the sludge is easy to expand and the residual sludge is more in the traditional biochemical bacteria method are solved.
The nanofiltration filter 18 is connected with the external MBR sludge filter 15 through a filtration buffer tank 22, clarified water discharged from the external MBR sludge filter 15 is stored in the filtration buffer tank 22, when the nanofiltration filter 18 works, the clarified water in the filtration buffer tank 22 is pressurized and then is conveyed to a nanofiltration membrane of the nanofiltration filter 18, nano-scale pollutants in the clarified water are filtered through the nanofiltration membrane, one side of the reverse osmosis filter 19 is communicated with the nanofiltration filter 18 through a clear water buffer tank 20, the other side of the reverse osmosis filter 19 is communicated with a water outlet buffer tank 21, when the reverse osmosis filter 19 works, filtered water filtered by the nanofiltration filter 18 and stored in the clear water buffer tank 20 is pressurized and then is conveyed to a reverse osmosis membrane of the reverse osmosis filter 19, molecular-level pollutants in the filtered water are filtered through the reverse osmosis membrane, and the content of raw water after being filtered by the reverse osmosis membrane is reduced to, the ammonia nitrogen content is reduced to 10 mg/l. The water outlet buffer tank 21 is provided with a water outlet pipe 29, and water in the water outlet buffer tank 21 is discharged or recycled through the water outlet pipe 29.
When the landfill leachate device works, after raw water (landfill leachate stock solution) collected at first is discharged into the raw water pool 1, in the process that raw water is pumped from a raw water pool 1 to a Fenton reaction tower 5, sulfuric acid with the concentration of 98 percent is added into the raw water through a sulfuric acid dosing tank 3 to adjust the pH value to be between 1 and 3, measuring the pH value of the raw water through a sampling port arranged on the communicating pipeline, adjusting the adding amount of concentrated sulfuric acid through a valve to keep the pH value of the raw water between 1 and 3 after adding sulfuric acid, by the principle that the concentrated sulfuric acid releases heat when being mixed with water, the raw water in the pipeline is heated, the original mixed bacteria in the raw water are killed at higher temperature, thereby ensuring that the original mixed bacteria in the raw water can not influence the biochemical bacteria in the mud film composite aeration tank 14, meanwhile, the metal ion precipitate in the raw water is dissolved by sulfuric acid, so that the metal ion precipitate is prevented from being accumulated in the pipeline to block the pipeline.
0.1 part of ferrous sulfate is added into the pipeline mixer 2 according to each part of raw water through the ferrous sulfate dosing tank 4, the sulfuric acid and the ferrous sulfate are respectively and fully mixed with the raw water through the pipeline mixer 2, meanwhile, the pipeline mixer 2 reduces the larger pressure generated by the higher temperature generated when the concentrated sulfuric acid is dissolved in the water, and the raw water enters the Fenton reaction tower 5 through a pipeline after being mixed.
After raw water enters a Fenton reaction tower 5, 1 part of hydrogen peroxide with the concentration of 30% is added into each part of wastewater, the raw water is subjected to Fenton reaction with hydrogen peroxide and ferrous sulfate in the Fenton reaction tower 5, and chain reaction between ferrous ions (Fe2+) and the hydrogen peroxide is catalyzed to generate hydroxyl radicals, so that the raw water has strong oxidizing capability, organic matters which are difficult to degrade biologically or to oxidize effectively into inorganic matters, and the COD content in the raw water is reduced.
Raw water after the fenton reaction enters a neutralization and precipitation tank 8 through a circulating pipe 9 and a discharge pipe 23, sodium hydroxide is added into the neutralization and precipitation tank 8 through a sodium hydroxide dosing tank 7 to adjust the pH value to 7-8, so that the raw water and the sodium hydroxide are subjected to neutralization and precipitation reaction, the raw water in the neutralization and precipitation tank 8 is sampled and detected, and a dosing valve of the sodium hydroxide dosing tank 7 is adjusted to keep the pH value of the raw water in the neutralization and precipitation tank 8 between 7 and 8, so that metal ions which are easy to form metal ion precipitates in the raw water form precipitates, the pH value of the raw water is improved, and the influence of over-high acidity on biochemical bacteria in a sludge membrane aeration tank 14 is avoided.
Raw water subjected to neutralization and precipitation reaction in the neutralization and precipitation tank 8 enters the coagulation tank 12, 1-3ppm of PAM (flocculating agent) is added into the coagulation tank 12 through the PAM dosing tank 11, the raw water and the PAM are fully and uniformly mixed through a stirrer on the coagulation tank 12 to carry out coagulation, metal ion precipitates in the raw water are flocculated into clusters through the PAM, and the coagulation time is more than 30 min.
The coagulated raw water enters the precipitation tower 13 for precipitation, after the raw water enters the precipitation tower 13, the flocculated metal ion precipitate is precipitated into a mud bucket of the precipitation tower 13 through the slow flow of the raw water, the precipitation time is 1-1.5h, the metal ion precipitate is sucked to the sludge at the bottom of the precipitation tower 13 after being precipitated, so that the metal ion precipitate is discharged, the metal ion content in the percolate is reduced, meanwhile, the influence of metal ions on biochemical bacteria can be effectively avoided by reducing the metal content in the raw water, and the phenomenon that the biochemical bacteria lose activity due to overhigh metal ion content of the biochemical bacteria in the raw water is prevented.
Supernatant after the sedimentation in the sedimentation tower 13 enters the sludge membrane aeration tank 14, raw water is subjected to primary biochemical reaction in the sludge membrane aeration tank 14, the time for the raw water to perform the biochemical reaction in the sludge membrane composite aeration tank 14 is 24 hours, organic matters in the raw water are degraded through biochemical bacteria, and the organic matters which are not degraded in the Fenton reaction are degraded through the biochemical bacteria, so that the COD and ammonia nitrogen content in the raw water are greatly reduced.
Raw water after the biochemical reaction of once carrying out gets into external MBR sludge filter 15 and carries out secondary biochemical reaction and filters mud, filtration membrane through external MBR sludge filter 15 filters raw water, the play water of external MBR sludge filter 15 flows back to mud membrane aeration tank 14 according to 30% proportion, the purpose of the play water of external MBR sludge filter 15 flows back according to 30% proportion is the concentration that reduces raw water in the compound aeration tank 14 of mud membrane, and reduce the concentration of raw water in the external MBR filter 15, make the concentration of play water reduce in the external MBR filter 15 from this.
Raw water filtered by the external MBR sludge filter 15 enters the nanofiltration filter 18 after being pressurized, the raw water is subjected to nano-scale filtration under the action of the nanofiltration membrane, so that pollutants such as larger molecular groups, fine particles and bacteria are separated from water, the external MBR sludge filter 15 reduces the content of the pollutants conveyed to the nanofiltration filter 18 by backflow, the service cycle of the nanofiltration membrane of the nanofiltration filter 18 can be effectively prolonged, and the nanofiltration membrane is prevented from being frequently cleaned or replaced.
The raw water after nanofiltration enters a reverse osmosis filter 19 after being pressurized, the raw water is subjected to reverse osmosis filtration under the action of a reverse osmosis membrane, so that the effluent only contains less pollutants, the effluent of the reverse osmosis filter 19 is stored in an effluent buffer tank 21, and the clear water in the effluent buffer tank 21 can reach the COD content of the raw water below 50mg/l and the ammonia nitrogen content below 10mg/l, so that the raw water can reach the first-level standard of the wastewater discharge standard and can be discharged or recycled after reaching the standard; the concentrated water of the nanofiltration filter and the reverse osmosis filter is collected and flows back to the raw water pool 1, and is filtered into clear water after circulation.
The garbage leachate treatment device kills sundry bacteria in raw water by the heat release principle when concentrated sulfuric acid is dissolved in water, and precipitates most of metal ions by neutralization, and the influence of the sundry bacteria and the metal ions on biochemical bacteria in a sludge membrane aeration tank is eliminated by the method, so that the COD and the ammonia nitrogen content in the raw water can be stably reduced, the raw water is filtered step by an external MBR (membrane biological reactor) filter 15, a nanofiltration filter 18 and a reverse osmosis filter 19 to reach the first-level discharge standard (COD: 50 mg/l; ammonia nitrogen: 10 mg/l) of the sewage discharge standard after being filtered, and the problems of poor treatment stability and large fluctuation of the COD and the ammonia nitrogen content in effluent in the traditional raw water treatment device and treatment method are solved.
Claims (7)
1. The utility model provides a landfill leachate's processing apparatus, comprises processing apparatus A and processing apparatus B, its characterized in that: the treatment device A is communicated with the treatment device B through a communicating pipe, and the treatment device A is composed of a raw water pool (1), a pipeline mixer (2), a Fenton reaction tower (5) and a precipitation tower (13); a pipeline mixer (2), a Fenton reaction tower (5) and a precipitation tower (13) are sequentially arranged on one side of the raw water pool (1); the raw water pool (1) is sequentially communicated with the mixer (2), the Fenton reaction tower (5) and the precipitation tower (13) through communicating pipelines, and the precipitation tower (13) is provided with a communicating pipe (25); the treatment device B is composed of a precipitation buffer tank (16), a mud membrane composite aeration tank (14), an external MBR sludge filter (15), a nanofiltration filter (18) and a reverse osmosis filter (19), wherein the mud membrane composite aeration tank (14), the external MBR sludge filter (15), the nanofiltration filter (18) and the reverse osmosis filter (19) are sequentially arranged on one side of the precipitation buffer tank (16), the precipitation buffer tank (16) is sequentially communicated with the mud membrane composite aeration tank (14), the external MBR sludge filter (15), the nanofiltration filter (18) and the reverse osmosis filter (19) through communicating pipes, and the precipitation buffer tank (16) is communicated with the communicating pipes (25).
2. The landfill leachate treatment plant of claim 1, wherein: a sulfuric acid dosing tank (3) is arranged on a communicating pipeline between the pipeline mixer (2) and the raw water pool (1) through a communicating pipeline, and a ferrous sulfate dosing tank (4) is arranged on the pipeline mixer (2) through a communicating pipeline.
3. The landfill leachate treatment plant of claim 1, wherein: a neutralization settling tank (8) is arranged on the Fenton reaction tower (5); a hydrogen peroxide dosing tank (6) is arranged on the Fenton reaction tower (5) through a connecting pipe; a sodium hydroxide dosing tank (7) is arranged on the neutralization and precipitation tank (8) through a connecting pipe; the Fenton reaction tower (5) is communicated with the neutralization settling tank (8) through a discharge pipe (23); one side of the Fenton reaction tower (5) is provided with a circulating pipe (9), and the circulating pipe (9) is communicated with a discharge pipe (23); an overflow pipe (10) is arranged on the other side of the Fenton reaction tower (5), and the overflow pipe (10) is communicated with the raw water pool (1).
4. The landfill leachate treatment plant of claim 1, wherein: a coagulation tank (12) is arranged on the settling tower (13); the coagulation tank (12) is provided with a PAM dosing tank (11) through a connecting pipe; the coagulation tank (12) is communicated with the neutralization sedimentation tank (8) through a connecting pipe; a sedimentation tower sludge discharge pipe (26) is arranged at the bottom of the sedimentation tower (13), and a communicating pipe (25) is arranged on the sedimentation tower (13) above the sedimentation tower sludge discharge pipe (26).
5. The landfill leachate treatment plant of claim 1, wherein: the external MBR sludge filter (15) is communicated with the nanofiltration filter (18) through a filtering buffer tank (22), the reverse osmosis filter (19) is communicated with the nanofiltration filter (18) through a clear water buffer tank (20), the reverse osmosis filter (19) is provided with a water outlet buffer tank (21) through a communicating pipeline, and the water outlet buffer tank (21) is provided with a water outlet pipe (29).
6. The landfill leachate treatment plant of claim 1, wherein: the mud film composite aeration tank (14) is provided with an aeration pump (28) through an aeration pipe (24).
7. The landfill leachate treatment plant of claim 1, wherein: and one side of the external MBR sludge filter (15) is provided with a return pipe (17), the return pipe (17) is communicated with the sludge membrane composite aeration tank (14), and the other side of the external MBR sludge filter (15) is provided with an MBR sludge discharge pipe (27).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921239459.1U CN210457853U (en) | 2019-08-02 | 2019-08-02 | Landfill leachate's processing apparatus |
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| CN201921239459.1U CN210457853U (en) | 2019-08-02 | 2019-08-02 | Landfill leachate's processing apparatus |
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| CN210457853U true CN210457853U (en) | 2020-05-05 |
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